html {
    touch-action: manipulation;
}
.flex-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
  
.flex-item {
    flex-basis: calc(33.33% - 20px);
    margin-bottom: 20px;
}
body {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: Arial, sans-serif;
}
canvas {
    margin: 10px;
}